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Afla suma tuturor numerelor de forma 23a . Rezolva in 2 moduri

Răspuns :

230 + 232 + 234 + 236 + 238 = 1170
230 × 5 + 2 + 4 + 6 + 8 = 1170
23a={230,231,232,233,234,235,236,237,238,239}-toate numerele de aceasta  forma ..
230+231+232+233+234+235+236+237+238+239=230+470+470+470+470+235=700+1410+235=2110+235=2345-suma tuturor numerelor..
Sper ca te-am ajutat..